Contec F&eIT Series User Manual page 47

7. Virtual Address Map
- Module settings area (00301000h)
The module settings area contains a 128-byte image that is the same as the module information for
each module. Settings are written into the module settings area by a higher host. Assigning the
value 0x01 to the module startup register causes the module to start up according to the settings
provided in the module settings area, and this value is reflected in the module information when
the module activation instruction is asserted.
Example: Analog I/O terminal
Module information
Device ID
Number of basic input channels = 1
Number of basic output channels = 1
Module startup register
Error status
Analog input resolution = 12
Analog input range = ±10V
Analog output resolution = 12
Analog output range = ±5V
Figure 7.4. Analog I/O Terminal
Remarks
When the module is successfully started, the value 0x01 is stored in the module startup register for
module information and the value 0x00 in the error status. If an error is found in the settings
parameter, the value 0x00 is stored in the module startup register for module information and an
error status other than 0x00 in the error status register.
If the module startup instruction is asserted when the module is already operating (module startup
register = 0x01), the settings that are provided in the module settings area will be reflected in the
operation of the module.
The startup of the module by means of the module startup register is executed upon completion of
virtual address access to the I/O unit. This structure takes into account the fact that the host may
simultaneously access both the settings data and the module startup register.
40
Reset
Module settings area
Module started
Module startup register
Analog input range = ±10V
Analog output range = ±5V
Device-specific information
Device ID
Number of basic input channels = 1
Number of basic output channels = 1
Analog input resolution = 12
Analog output resolution = 12
Written by a higher host
via communications (this
value is saved and reflected
in the system when the system
is restarted).
CPU-CA10(FIT)GY, CPU-CA20(FIT)GY